Synchronous lifting follow-up hidden type annular dam device

Abstract

The invention discloses a follow-up hidden type annular dam device capable of synchronously lifting. The follow-up hidden type annular dam device comprises membrane cloth, acrylic circular rings, circular ring supporting assemblies and lifting assemblies. The acrylic circular ring is coaxially fixed to the peripheral side of the upper end of the circular ring supporting assembly, and the upper end of the acrylic circular ring is located above the upper end of the circular ring supporting assembly. The lifting assembly is connected with the circular ring supporting assembly and used for driving the circular ring supporting assembly to drive the acrylic circular ring and the membrane cloth connected to the circular ring supporting assembly to ascend and descend vertically. The membrane cloth is in a special-shaped circular ring shape, the inner circumferential side of the membrane cloth is fixedly connected with the outer circumferential side of the circular ring supporting assembly, and the outer circumferential side of the membrane cloth is fixedly connected with an underwater civil engineering embedded part. The water retaining wall has the advantages that the problem that a traditional glass water retaining wall is single in function, an annular dam becomes a part of a performance stage, and the performance stage of a traditional theater is obviously separated from an auditorium is solved, and dry and wet area boundaries are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of stage performance mechanical equipment, and in particular to a synchronously lifting and lowering follow-up hidden annular dam device. Background Art

[0002] As audiences' aesthetic tastes improve, stage performances are no longer limited to traditional forms. They need to continuously incorporate new elements and creativity, with close interaction with the audience and performances that are close to the audience, so that the audience can be integrated into the performance, making the performance more attractive, enhancing the viewing experience, and making the performance more diverse. However, traditional ring dams are mainly fixed, with low utilization rates. At the same time, the clear separation between the stage and the audience seats restricts the space and form of the performance. In addition, the distance between the audience and the actors is too far, which reduces the audience's viewing experience and reduces the utilization rate of the venue. Summary of the Invention

[0003] The object of the present invention is to provide a synchronously movable hidden annular dam device, thereby solving the above-mentioned problems existing in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A synchronously raised and lowered hidden annular dam device comprises a membrane cloth, an acrylic ring, a ring support assembly and a lifting assembly; the acrylic ring is coaxially fixed to the outer peripheral side of the upper end of the ring support assembly, and the upper end of the acrylic ring is located above the upper end of the ring support assembly; the lifting assembly is connected to the ring support assembly to drive the ring support assembly to drive the acrylic ring and membrane cloth connected thereto to rise and fall; the membrane cloth is in the shape of an irregular ring, the inner peripheral side of the membrane cloth is fixedly connected to the outer peripheral side of the ring support assembly, and the outer peripheral side of the membrane cloth is fixedly connected to the underwater civil engineering embedded parts.

[0006] Preferably, the lifting assembly includes a plurality of hydraulic cylinders uniformly distributed along the circumference of the circular support assembly; the non-driving end of the hydraulic cylinder is connected to the underwater civil engineering embedded parts through a flange, and an adjustment gasket for adjusting the horizontal height is provided under the flange; the driving end of the hydraulic cylinder is hingedly connected to the U-shaped fixing seat through a lifting ear, and the U-shaped fixing seat is fixedly connected to the circular support assembly.

[0007] Preferably, the annular dam device also includes a guide assembly, and a plurality of guide assemblies are evenly arranged along the circumference of the circular support assembly; the guide assembly includes a guide rail support assembly, a guide rail assembly and a guide wheel assembly, the guide rail assembly is vertically fixed on the underwater civil engineering embedded parts through the guide rail support assembly, and the guide wheel assembly is arranged on the inner circumference side of the lower end of the circular support assembly, and the guide wheel assembly is correspondingly connected to the guide rail assembly, so that the guide wheel assembly can slide up and down along the guide rail assembly.

[0008] Preferably, the two ends of the membrane cloth are respectively connected to the underwater civil engineering embedded parts and the circular ring support assembly through a membrane cloth connecting assembly; the membrane cloth connecting assembly includes a membrane cloth pressure plate, an expansion sealing gasket, an intermediate structural glue and an epoxy resin glue, and the ends of the membrane cloth are correspondingly extended between the two membrane cloth pressure plates and fixedly connected by bolts, and the two membrane cloth pressure plates are provided with epoxy resin glue on the side away from the membrane cloth; expansion sealing gaskets and intermediate structural glue are sequentially provided between the membrane cloth and each membrane cloth pressure plate.

[0009] Preferably, an annular civil engineering groove is provided on the underwater civil engineering embedded part, the outer peripheral side of the membrane cloth is connected to the underwater civil engineering embedded part on the outer peripheral side of the civil engineering groove via a membrane cloth connecting assembly, the guide rail support assembly and the non-driving end of the hydraulic cylinder are correspondingly installed in the civil engineering groove, and when the circular support assembly is hidden underwater under the drive of the lifting assembly, the membrane cloth falls into the civil engineering groove.

[0010] Preferably, a membrane cloth water retaining assembly is provided on the underwater civil engineering embedded part, and the membrane cloth water retaining assembly includes an annular tube, an annular retaining ring, an adjusting part and a water retaining part; the longitudinal cross-section of the water retaining part is L-shaped, and the vertical part and the horizontal part of the water retaining part are connected via an adjusting part; the upper end of the water retaining part is fixedly connected to the lower end of the circular ring support assembly, and the annular tube is coaxially fixed to the lower end of the water retaining part, and the adjusting part is used to change the relative distance between the vertical part and the horizontal part of the water retaining part, so that the annular tube is always in close contact with the outer peripheral side of the civil engineering groove, and the annular retaining ring is coaxially arranged at the upper end of the outer peripheral side of the civil engineering groove. When the circular ring support assembly is hidden underwater under the drive of the lifting assembly, the membrane cloth falls into the space surrounded by the water retaining part, the annular tube, the annular retaining ring, the circular ring support assembly and the outer peripheral side of the civil engineering groove.

[0011] Preferably, the circular ring support assembly includes a support body, a U-shaped acrylic slot, a guide support assembly and a cylinder support assembly; the U-shaped acrylic slot is coaxially arranged on the outer peripheral side of the upper end of the support body, and the acrylic ring is coaxially arranged in the U-shaped acrylic slot; the guide support assembly is arranged on the inner peripheral side of the lower end of the support body, and the guide wheel assembly is fixedly connected to the guide support assembly; the side of the water retaining member away from the annular tube is fitted and fixed to the guide support assembly; the cylinder support assembly is arranged on the inner peripheral side of the upper end of the support body, and the U-shaped fixing seat is fixedly connected to the cylinder support assembly.

[0012] Preferably, PF cotton is laid on the inner wall of the U-shaped acrylic groove, an acrylic pad is provided between the lower end of the acrylic ring and the PF cotton, and there is a certain gap between the inner and outer sides of the acrylic ring and the PF cotton on the corresponding sides, and the gap is filled with sealing structural glue and non-shrinkage waterproof cement from top to bottom.

[0013] Preferably, the membrane cloth is formed by splicing together a plurality of single waterproof cloth pieces, and the ends of the membrane cloth are folded in three layers and provided with nylon ropes.

[0014] Preferably, a performance area is set up on the upper end of the circular support assembly, and performance equipment and a drainage device are arranged in the performance area.

[0015] The beneficial effects of this invention are: it can solve the single function of traditional glass retaining walls, turning the circular dam into part of the performance stage, eliminating the obvious separation between the performance stage and the auditorium in traditional theaters, and achieving a clear demarcation between wet and dry areas. This solves the singleness of the performance format, while also shortening the distance between the surrounding audience and the performers, improving the viewing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural diagram of an annular dam device according to an embodiment of the present invention;

[0017] Figure 2 is a structural diagram of a guide assembly in an embodiment of the present invention;

[0018] Figure 3 This is a structural diagram of a membrane-cloth connection assembly in an embodiment of the present invention;

[0019] Figure 4 This is a structural diagram of a membrane cloth water retaining assembly in an embodiment of the present invention;

[0020] Figure 5 is a structural diagram of a circular ring support assembly in an embodiment of the present invention;

[0021] Figure 6 2 is a schematic structural diagram of a U-shaped acrylic notch in an embodiment of the present invention.

[0022] In the figure: 1. Ring support assembly; 1.1. Support body; 1.2. U-shaped acrylic notch; 1.3. Guide support assembly; 1.4. Cylinder support assembly; 2. Guide assembly; 2.1. Guide rail support assembly; 2.2. Guide rail assembly; 2.3. Guide wheel assembly; 3. Membrane cloth connection assembly; 3.1. Membrane cloth pressure plate; 3.2. Expansion sealant; 3.3. Intermediate structural adhesive; 3.4. Epoxy resin adhesive; 4. Membrane Cloth water retaining assembly; 4.1. Annular tube; 4.2. Annular retaining ring; 4.3. Water retaining part; 4.4. Adjusting part; 5. Hydraulic cylinder; 5.1. Flange; 5.2. Adjusting gasket; 5.3. Lifting ear; 6. Membrane cloth; 7. Acrylic ring; 7.1. PF cotton; 7.2. Acrylic pad; 7.3. Sealing structural adhesive; 7.4. Non-shrinkage waterproof cement; 8. Underwater civil engineering embedded parts; 8.1. Civil engineering trough. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] In this embodiment, Figure 1 As shown, a synchronously liftable and follow-up hidden annular dam device is provided, comprising a membrane cloth 6, an acrylic ring 7, a ring support assembly 1 and a lifting assembly; the acrylic ring 7 is coaxially fixed to the outer peripheral side of the upper end of the ring support assembly 1, and the upper end of the acrylic ring 7 is located above the upper end of the ring support assembly 1; the lifting assembly is connected to the ring support assembly 1 for driving the ring support assembly 1 to drive the acrylic ring 7 and the membrane cloth 6 connected thereto to lift up and down; the membrane cloth 6 is in the shape of an irregular circular ring, the inner peripheral side of the membrane cloth 6 is fixedly connected to the outer peripheral side of the ring support assembly 1, and the outer peripheral side of the membrane cloth 6 is fixedly connected to the underwater civil engineering embedded part 8.

[0025] In this embodiment, a performance area is set up on the upper end of the circular support assembly 1, and performance equipment and drainage devices are installed in the performance area.

[0026] In this embodiment, the annular dam device includes two working modes:

[0027] State 1: Hidden water storage mode

[0028] The annular dam device is completely submerged below the water surface. Through the sealing of the acrylic ring 7 and the sealing of the membrane cloth 6 and the supporting assembly, the inside and outside of the acrylic ring 7 form an integrated lake surface, realizing the expansion of the natural water area and the integration of the landscape, maintaining the continuity and visual integrity of the water surface.

[0029] State 2: Lifting boundary mode

[0030] When the ring dam rises to 600mm above the water surface, it forms a boundary between the central performance area and the surrounding waters. The water in the performance area is drained into the pool via a drainage system, completing the circulation process. The performance equipment in the performance area performs the performance movements based on the creative ideas. Throughout the performance, the acrylic ring 7 absorbs the impact of the waves in the surrounding waters.

[0031] In this embodiment, the lifting assembly is jointly acted upon by 12 groups of hydraulic cylinders 5 (the number of hydraulic cylinders 5 can be adjusted according to actual conditions). The 12 groups of hydraulic cylinders 5 are evenly distributed on the circular support assembly 1. The non-driving end of the hydraulic cylinder 5 is connected to the underwater civil engineering embedded part 8 through a flange 5.1, and an adjustment gasket 5.2 for adjusting the horizontal height is provided under the flange 5.1; the driving end of the hydraulic cylinder 5 is hingedly connected to the U-shaped fixing seat through the lifting ear 5.3, and the U-shaped fixing seat is fixedly connected to the circular support assembly 1 by bolts.

[0032] The upper end of the membrane cloth 6 is connected to the ring support assembly 1, and the lower end of the membrane cloth 6 is connected to the underwater civil engineering embedded part 8. The ring support assembly 1 is driven by hydraulic pressure to rise and fall, so that the acrylic ring 7 is raised and lowered to drive the membrane cloth 6 to rise and fall. Even if the acrylic ring 7 assembly is raised to the highest position, the ring lifting assembly is still below the water surface, and only the acrylic ring 7 is present above the water surface, so that the ring lifting assembly is hidden.

[0033] The lifting assembly utilizes a multi-cylinder synchronous control device, enabling precise multi-channel flow control with a flow accuracy of 1% for each channel. This automatically eliminates errors within each channel, preventing cumulative errors. It also features an automatic oil replenishment function to prevent vacuum buildup. The entire lifting assembly utilizes an independent control module, unaffected by other system circuits. It can independently regulate pressure and provide stepless adjustment of the lifting speed based on time constraints. The hydraulic circuit can maintain position at any height, controlling the amount of water inflow to create circular waterfalls of varying sizes. Pressure can be maintained for extended periods of time at any height, ensuring a constant position. The independently controlled oil circuit is equipped with a precision filter to maintain hydraulic oil cleanliness and high reliability. A manual ball valve is installed in the oil circuit to facilitate repair and maintenance. The oil circuit medium is water-soluble, environmentally friendly, and biodegradable, and will not form an oil film on the water surface.

[0034] In this embodiment, Figure 2As shown, the annular dam device also includes 8 groups of guide assemblies 2 (the number of guide assemblies 2 can be adjusted according to actual conditions), and the 8 groups of guide assemblies 2 are evenly arranged along the circumference of the circular support assembly 1; the guide assembly 2 includes a guide rail support assembly 2.1, a guide rail assembly 2.2 and a guide wheel assembly 2.3, the guide rail assembly 2.2 is vertically fixed on the underwater civil engineering embedded part 8 through the guide rail support assembly 2.1, and the guide wheel assembly 2.3 is arranged on the inner circumference of the lower end of the circular support assembly 1, and the guide wheel assembly 2.3 is correspondingly connected with the guide rail assembly 2.2, so that the guide wheel assembly 2.3 can slide up and down along the guide rail assembly 2.2. The lifting of the circular support assembly 1 drives the guide wheel assembly 2.3 to move on the guide rail assembly 2.2, realizing the guiding effect and making the acrylic ring 7 run smoothly.

[0035] In this embodiment, Figure 3 and Figure 4 As shown, an annular civil engineering groove 8.1 is provided on the underwater civil engineering embedded part 8, and the outer peripheral side of the membrane cloth 6 is correspondingly connected to the underwater civil engineering embedded part 8 on the outer peripheral side of the civil engineering groove 8.1 through the membrane cloth connecting component 3, and the guide rail support component 2.1 and the non-driving end of the hydraulic cylinder 5 are correspondingly installed in the civil engineering groove 8.1. When the circular support component 1 is hidden underwater under the drive of the lifting component, the membrane cloth 6 falls into the civil engineering groove 8.1.

[0036] In this embodiment, Figure 3 As shown, the two ends of the membrane cloth 6 are respectively connected to the underwater civil engineering embedded parts 8 and the circular ring support assembly 1 through the membrane cloth connecting assembly 3; the membrane cloth connecting assembly 3 includes a membrane cloth pressing plate 3.1, an expansion sealing pad 3.2, an intermediate structural glue 3.3 and an epoxy resin glue 3.4, and the end of the membrane cloth 6 extends into between the two membrane cloth pressing plates 3.1 and is fixedly connected by bolts. The two membrane cloth pressing plates 3.1 are each provided with epoxy resin glue 3.4 on the side away from the membrane cloth 6; an expansion sealing pad 3.2 and an intermediate structural glue 3.3 are sequentially provided between the membrane cloth 6 and each membrane cloth pressing plate 3.1.

[0037] The expansion seal 3.2 fits tightly against the membrane 6 and expands when exposed to water. The membrane pressure plate 3.1 compresses the membrane 6 against the expansion seal 3.2. Hydraulically, the acrylic ring 7 rises, driving the membrane 6 upwards. This activates the water-retaining function, preventing leakage or tearing. When the acrylic ring 7 descends, it lowers the membrane 6 with it. The weight of the water forces the membrane 6 into the civil engineering groove 8.1, concealing it.

[0038] The membrane cloth pressure plate 3.1 is an annular arc plate, and there is a nylon rope at the end of the membrane cloth 6. During the process of the membrane cloth 6 lifting and lowering to carry water, the nylon rope at the end is close to the membrane cloth pressure plate 3.1, reinforcing the strength of the membrane cloth 6 to prevent it from being torn and deformed after carrying water. In this way, the bottom of the water surface and the circular support assembly 1 are connected by the membrane cloth 6, which presents a water-blocking function.

[0039] In this embodiment, Figure 4 As shown, a membrane cloth water retaining assembly 4 is provided on the underwater civil engineering embedded part 8, and the membrane cloth water retaining assembly 4 includes an annular circular tube 4.1, an annular retaining ring 4.2, an adjusting part 4.4 and a water retaining part 4.3; the longitudinal cross-section of the water retaining part 4.3 is L-shaped, and the vertical part and the horizontal part of the water retaining part 4.3 are connected via the adjusting part 4.4; the upper end of the water retaining part 4.3 is fixedly connected to the lower end of the circular ring support assembly 1, the annular circular tube is coaxially fixed to the lower end of the water retaining part 4.3, and the adjusting part 4.4 is used to change the relative distance between the vertical part and the horizontal part of the water retaining member 4.3, so that the annular circular tube is always in close contact with the outer peripheral side of the civil engineering groove 8.1. The annular retaining ring 4.2 is coaxially arranged at the upper end of the outer peripheral side of the civil engineering groove 8.1. When the annular support assembly 1 is hidden underwater under the drive of the lifting assembly, the membrane cloth 6 falls into the space enclosed by the water retaining member 4.3, the annular circular tube 4.1, the annular retaining ring 4.2, the annular support assembly 1 and the outer peripheral side of the civil engineering groove 8.1.

[0040] The relative position of the vertical and horizontal portions of the water retaining member 4.3 can be adjusted using the adjusting member 4.4 according to the actual size of the civil engineering groove 8.1, thereby ensuring that there is no gap between the annular tube 4.1 mounted thereon and the civil engineering groove 8.1, and that the membrane cloth 6 will never fall into the gap between the civil engineering groove 8.1 and the annular ring. The membrane cloth water retaining assembly 4 is connected to the annular support assembly 1 and rises and falls with the annular support assembly 1, and the annular tube 4.1 slides up and down along the edge of the civil engineering groove 8.1. When the entire water surface is impacted by waves, the membrane cloth 6 is pressed against one side of the water retaining member 4.3, and almost all the water pressure and the gravity of the water act on the water retaining member 4.3. The membrane cloth 6 bears almost no force, so that the membrane cloth 6 rises and falls with the membrane cloth water retaining assembly 4 within the limited space. A ring 4.2 formed by a circular tube is provided at the edge of the civil engineering groove 8.1. When the membrane cloth 6 descends and is at the lowest position, there will be no scratching or tearing against the edge of the underwater civil engineering embedded member 8.

[0041] In this embodiment, Figure 5As shown, the annular support assembly 1 includes a support body 1.1, a U-shaped acrylic slot 1.2, a guide support assembly 1.3 and a cylinder support assembly 1.4; the U-shaped acrylic slot 1.2 is coaxially arranged on the outer peripheral side of the upper end of the support body 1.1, and the acrylic ring 7 is coaxially arranged in the U-shaped acrylic slot 1.2; the guide support assembly 1.3 is arranged on the inner peripheral side of the lower end of the support body 1.1, and the guide wheel assembly 2.3 is fixedly connected to the guide support assembly 1.3; the side of the water retaining member 4.3 away from the annular tube 4.1 is fitted and fixed to the guide support assembly 1.3; the cylinder support assembly 1.4 is arranged on the inner peripheral side of the upper end of the support body 1.1, and the U-shaped fixing seat is fixedly connected to the cylinder support assembly 1.4.

[0042] In this embodiment, Figure 6 As shown, PF cotton 7.1 is laid on the inner wall of the U-shaped acrylic groove 1.2, and an acrylic pad 7.2 is provided between the lower end of the acrylic ring 7 and the PF cotton 7.1. There is a certain gap between the inner and outer sides of the acrylic ring 7 and the PF cotton 7.1 on the corresponding sides. The gap is filled with sealing structural glue 7.3 and non-shrinkage waterproof cement 7.4 from top to bottom.

[0043] Acrylic material has a certain coefficient of expansion and is significantly affected by temperature fluctuations. As the temperature rises, the material expands outward, while as the temperature drops, it contracts. Therefore, when installing the acrylic ring 7, a certain expansion gap must be left between its inner and outer sides and the U-shaped acrylic notch 1.2. PF cotton 7.1 is also added to the U-shaped acrylic notch 1.2 to increase the shrinkage gap distance of the acrylic ring 7 at low temperatures. The acrylic ring 7 has a diameter of 14.78mm and is bent at high temperature using a custom bending machine, then seamlessly spliced ​​together.

[0044] In this embodiment, the shape of the membrane cloth 6 is determined according to the movement trajectory of its lifting state and the space of the underwater civil engineering embedded parts 8. The membrane cloth 6 is composed of three single waterproof cloth pieces to form an anisotropic circular ring. Each single waterproof cloth piece is spliced ​​and formed by a high-frequency welding gun. In order to enhance the strength of the end of the membrane cloth 6, three layers are folded and nylon ropes are strung at the end to achieve seamless welding.

[0045] By adopting the above technical solution disclosed in the present invention, the following beneficial effects are obtained:

[0046] This invention provides a synchronously movable, concealed annular dam device that overcomes the single function of traditional glass retaining walls. By integrating the annular dam into the performance stage, it eliminates the obvious separation between the stage and the auditorium in traditional theaters and establishes a clear demarcation between wet and dry areas. This solves the monotony of the performance format while also shortening the distance between the audience and the performers, enhancing the viewing experience.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A synchronously movable hidden annular dam device, characterized by: It includes a membrane cloth, an acrylic ring, a ring support assembly and a lifting assembly; the acrylic ring is coaxially fixed to the outer peripheral side of the upper end of the ring support assembly, and the upper end of the acrylic ring is located above the upper end of the ring support assembly; the lifting assembly is connected to the ring support assembly to drive the ring support assembly to drive the acrylic ring and membrane cloth connected thereto to move up and down; the membrane cloth is in the shape of an irregular ring, the inner peripheral side of the membrane cloth is fixedly connected to the outer peripheral side of the ring support assembly, and the outer peripheral side of the membrane cloth is fixedly connected to the underwater civil engineering embedded parts.

2. The synchronously-liftable and follow-up hidden annular dam device according to claim 1 is characterized in that: The lifting assembly includes a plurality of hydraulic cylinders uniformly distributed along the circumference of the circular support assembly; the non-driving end of the hydraulic cylinder is connected to the underwater civil engineering embedded parts through a flange, and an adjustment gasket for adjusting the horizontal height is provided under the flange; the driving end of the hydraulic cylinder is hingedly connected to the U-shaped fixing seat through a lifting lug, and the U-shaped fixing seat is fixedly connected to the circular support assembly.

3. The synchronously-liftable and follow-up hidden annular dam device according to claim 2 is characterized in that: The annular dam device also includes a guide assembly, and multiple guide assemblies are evenly arranged along the circumference of the circular support assembly; the guide assembly includes a guide rail support assembly, a guide rail assembly and a guide wheel assembly, the guide rail assembly is vertically fixed on the underwater civil engineering embedded parts through the guide rail support assembly, and the guide wheel assembly is arranged on the inner circumference side of the lower end of the circular support assembly, and the guide wheel assembly is correspondingly connected to the guide rail assembly, so that the guide wheel assembly can slide up and down along the guide rail assembly.

4. The synchronously-liftable and follow-up hidden annular dam device according to claim 3 is characterized in that: The two ends of the membrane cloth are respectively connected to the underwater civil engineering embedded parts and the circular ring support assembly through the membrane cloth connecting assembly; the membrane cloth connecting assembly includes a membrane cloth pressing plate, an expansion sealing gasket, an intermediate structural glue and an epoxy resin glue, and the ends of the membrane cloth are correspondingly extended between the two membrane cloth pressing plates and fixedly connected by bolts. The two membrane cloth pressing plates are both provided with epoxy resin glue on the side away from the membrane cloth; expansion sealing gaskets and intermediate structural glue are sequentially provided between the membrane cloth and each membrane cloth pressing plate.

5. The synchronously-liftable and follow-up hidden annular dam device according to claim 4 is characterized in that: An annular civil engineering groove is provided on the underwater civil engineering embedded part, and the outer peripheral side of the membrane cloth is connected to the underwater civil engineering embedded part on the outer peripheral side of the civil engineering groove via a membrane cloth connecting assembly. The guide rail support assembly and the non-driving end of the hydraulic cylinder are correspondingly installed in the civil engineering groove. When the circular support assembly is hidden underwater under the drive of the lifting assembly, the membrane cloth falls into the civil engineering groove.

6. The synchronously-liftable and follow-up hidden annular dam device according to claim 5 is characterized in that: The underwater civil engineering embedded parts are provided with a membrane cloth water retaining assembly, and the membrane cloth water retaining assembly includes an annular tube, an annular retaining ring, an adjusting part and a water retaining part; the longitudinal cross-section of the water retaining part is L-shaped, and the vertical part and the horizontal part of the water retaining part are connected via an adjusting part; the upper end of the water retaining part is fixedly connected to the lower end of the circular ring support assembly, and the annular tube is coaxially fixed to the lower end of the water retaining part, and the adjusting part is used to change the relative distance between the vertical part and the horizontal part of the water retaining part, so that the annular tube is always in close contact with the outer peripheral side of the civil engineering groove, and the annular retaining ring is coaxially arranged at the upper end of the outer peripheral side of the civil engineering groove. When the circular ring support assembly is hidden underwater under the drive of the lifting assembly, the membrane cloth falls into the space surrounded by the water retaining part, the annular tube, the annular retaining ring, the circular ring support assembly and the outer peripheral side of the civil engineering groove.

7. The synchronously-liftable and follow-up hidden annular dam device according to claim 6 is characterized in that: The circular ring support assembly includes a support body, a U-shaped acrylic slot, a guide support assembly and a cylinder support assembly; the U-shaped acrylic slot is coaxially arranged on the outer peripheral side of the upper end of the support body, and the acrylic ring is coaxially arranged in the U-shaped acrylic slot; the guide support assembly is arranged on the inner peripheral side of the lower end of the support body, and the guide wheel assembly is fixedly connected to the guide support assembly; the side of the water retaining member away from the annular tube is fitted and fixed to the guide support assembly; the cylinder support assembly is arranged on the inner peripheral side of the upper end of the support body, and the U-shaped fixing seat is fixedly connected to the cylinder support assembly.

8. The synchronously-liftable and follow-up hidden annular dam device according to claim 7 is characterized in that: PF cotton is laid on the inner wall of the U-shaped acrylic groove, and an acrylic pad is arranged between the lower end of the acrylic ring and the PF cotton. There is a certain gap between the inner and outer sides of the acrylic ring and the PF cotton on the corresponding side. The gap is filled with sealing structural glue and non-shrinkage waterproof cement from top to bottom.

9. The synchronously rising and falling hidden annular dam device according to claim 1 is characterized in that: The membrane cloth is formed by splicing a plurality of single waterproof cloth pieces, and the ends of the membrane cloth are folded in three layers and provided with nylon ropes.

10. The synchronously rising and falling hidden annular dam device according to claim 1 is characterized in that: A performance area is set up on the upper end of the circular support assembly, and performance equipment and a drainage device are arranged in the performance area.

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